and where there was little ambiguity around the absence of any reasonable defence. and what will the police look at? the starting point will be what sue gray has already uncovered. the investigation itself should be reasonably straightforward. now police have decided which of the events at downing street was potentially illegal, they�*lljust need to try and work out who was at each one, and they�*ll do that by looking at emails, at personal accounts and at movements on staff passes. and they�*ll also need to check whether anyone had a legitimate reason to be at any of the events. for some opposition politicians, the question is why did police not act sooner? did the officers who work in downing street every day not notice the events when they were happening? it sounds like there was a culture of lawbreaking parties rather than a single one—off event. we�*ve heard reports of wheelie suitcases of drink clanking through security. surely some officers